un Pre Conrad-Johnson a valvole
m.tonetti ha scritto:
Moder, che cosa usi come pre ?
Sempre AM Audio !
Hai provato con un pre a valvole ?
L'accoppiata Klimo Merlino (possibilmente Gold), A-70 Reference
mi stimola parecchio.
Ciao
MASSIMO
il PV8 per l'esattezza, un pò datato però .....
The PV8 superceded the PV5. It was the first all-tube zero-feedback design from conrad-johnson. The basic audio circuit of the PV8 is modular, built from individual gain blocks consisting of a triode amplifier direct coupled to a cathode follower. The phono stage consists of a gain block, a passive RIAA network, and a second gain block. The line stage consists of a single gain block. These stages use polypropylene capacitors bypassed by a polystyrene capacitor for the output stages. Even the main dc power supplies used polypropylene capacitors - there are no electrolytic capacitors in the audio circuits or their related power supplies. Paralleled triode sections at the phono input yield nearly 3 dB improvements in the signal to noise ratio over a single input tube (as used in the earlier PV5).
Features:
Inputs/Outputs — Phono, Tuner, Auxiliary, monitor and recording facilities for two tape decks with dubbing from Tape 1 to Tape 2. One amplifier (Main) output
Controls:
Selector, Tape 1/Tape 2, Source/Monitor, Mode (Left, Right, Stereo, Stereo Reverse, Mono), Balance, Power, Volume.
Auto muting to suppress warm-up transients.
Replacement Tube Set
V1 & V2: 12AX7
V3 & V5: 5751
V4 & V6: 5965
Specifications:
Gain: Phono Stage 47 dB (phono overload 200 mV at 1kHz)
Line Stage 31 dB
Distortion: less than .1% THD or IMD
Response: bandpass 2Hz to more than 100kHz
RIAA equalization: +/- .25 dB (20 to 20 kHz)
S/N Ratio: Phono Stage 76 dB below 10 mv input
Line Stage 85 dB below 2.5 volt output
Phase Response: Line Stage phase inverting, Phono Stage phase correct
Mechanical: 19" X 3 " x 12 "
Insisto per l'A-140 costa due soldi e li vale tutti.
Andate ad ascoltarlo resterete a bocca aperta.